James h



(No Model.)

J. H, FOGARTY & P. M. WHEELER."

STEAM AGTUATBD VALVE.

No. 380,882. Patented Ar. 10, 1888.

N. P512515, Pholo-Lilhogmphen Washin t n, D.,c.

UNITED STATES P TENT @Trrcn.

JAMES H. FOGARTY, OF NEW YORK, N. Y., AND FREDERICK M. WHEELER, OFMONTOLAIR, NEW JERSEY.

STEAM -ACTUATED VALVE.

SPECIFICATION forming part of Letters Patent 1 To.380,882 dated April10, 1888.

Application filed June 13, 1887. Serial No. 241,125. (No model.)

To all whom it may concern: Be it known that we, J AMES H. Foeanrv, NewYork city, in the county and State of New York, and FREDERICK M ERIAM WHELER 5 of Montclair, in the county of Essex and State New Jersey, haveinvented a certain new and useful Improvement in Steam Actuated Valves,of which the following is a specifica tion.

1 Our improved pump is of that class in which the reciprocating actionis effected by changing the action of the steam at the proper period ineach stroke without the necessity for a fly- Wheel.

Our improvement relates to the provisions for admitting and dischargingthe steam, and changing the direction of its action at the proper time.

The following is a description of what we consider the best means ofcarrying out the invention.

The accompanying drawings form a part of this specification.

Figure 1 is a general side elevation. Figs.

1 and 1 are corresponding views of certain portions on a larger scale.Fig. 2 is a plan view of certain portions, with the cover of thevalve-chest removed. Fig. 3 is a longitudinal section; and Fig. 3 is acorresponding section through a portion, showing the valve at one end ofits throw.

Similar letters of reference indicate corre' sponding parts in all thefigures where they occur.

A is the connecting casting uniting the pump-cylinder strongly andstiffly to B, the main steam-cylinder.

B is the main steam-chest, and O the main steam-piston, connected by apiston rod, 0, 0 with the pump-plunger. (Not shown.)

M is a casting, represented as forming a part of the steam-chest; butthis may be varied. The two hollow cylinders in are bored in the castingM, with their axes parallel and up- 5 right. Inthese are mounted twopiston-valves, P, connected by links Q to stout arms R on abalance-shaft, R. This is rocked through the medium of an arm, R, whichis operated by the aid of a reciprocating rod, 6, which is reciprocatedby steam-pressure, as will be presently explained. A pin, 1", on the armR is mounted in ablock, S, which is received in a short vertical slot,6, in the rod 6 to allow for the sweep of the arm R. The bearings of thebalanceshaft R are carried in nicely-finished boxes or bearing pieces 0,mounted in recesses in the steam-chest. The steam is admitted through apassage to the lower part of the steam-chest. On removing the boltswhich confine the steamchest cover access is obtained to thebalance-shaft R and its attachments to allow of examination, cleaning,or repairs.

Ports 1) communicate between each end of the main cylinder B andsuitable points in the corresponding upright cylinders m. Ports incommunicate between higher points on the cylinders m and anexhaust-passage which leads out laterally and communicates with asuitable pipe (not shown) to convey away the steam after it hasperformed its function of driving the pump.

There is a port, of, opening from the steamchest into each cylinder atat the bottom. There is also a liberal opening along the axis of each ofthe piston-valves P. The steam filling the steam-chest exerts itspressure alike on the upper and lower faces of the valves 1? and of theseveral connections. The steam-pressure is balanced. The weight of thepistonvalves P and the links Q is balanced by the So connection of thelatter to points at equal distances from the axis of the shaft R.

On the rod 6 is fixed a small piston, E, which works in a cylinder, W,actuated by steam supplied through a steam-chest, W, connected 8 5 byports w. The steam is admitted and ex hausted alternately from each sideof the piston E by means of a small slide-valve, V. Movement is given tothis valve V through an arm, X, carried on a rocking shaft, X, whichshaft extends out through a stuffing-box and has fixed on its outer enda sector, X, having set-screws m, as shown. This receives motion from alever, Y, loosely centered at its upper end on X, and connected by alink, Z, to the 5 main piston-rod c at its lower end. The lever Y isswung with a motion corresponding to the reciprocating motion of themain piston (3. Near each end of its movement it strikes a screw, 00,and rocks the shaft X,which, through its arm X, gives a correspondingmotion to the valve V. The set-screws a: can be set inward or outward tomake the reciprocating motion of the valve partake more or less of themotion of the main piston. These are held firmly by jam-nuts, as shown.The set-screws can be thus adjusted to vary the action while the pump isworking. This allows great facility for operating under the bestconditions under all circumstances.

WVe have shown double ports communicating between the steam-chest W andthe ends of the cylinder W. This is of advantage in cushioning theaction; but we do not esteem it essential.

In the operation, the pump being supposed to work against a properresistance, steam at high pressure is supplied to the small steamchestNV, and through the working of the valve V is admitted alternately tothe opposite ends of the cylinder W, thus driving the piston Evigorously from one end to the other of this latter cylinder and causingit to cushion on the steam imprisoned by the pressure of the doubleports 20. This piston E,through the rod 6 and transverse slot 6, turnsthe shaft It, raising one of the piston-valves P and lowering the other,the steam being also supplied to the steam-chest B, and thus to thespace below each pistonvalve I. The piston-valve P, which rises,lets thesteam under it flow through its port I) intoits end of the main cylinderB, while the opposite piston-valve (that which is lowered) allows thesteam to be received through its port I) and to flow past its waist andescape freely through the exhaust-port m. Thus conditioned, with thesteam exhausted from one side of the main piston and admitted to theopposite side the main piston 0 moves strongly and the pump makes astroke.

The link Z, connecting the main piston-rod c with the lever Y, rocks thelever Y. This is of no effect until the end of the stroke is nearlyreached. Then the lever Y strikes the proper set-screwx and commences tomove the valve V. This valve and its ports have no lap, and as soon asthis movement has progressed to a sufficient extent it exhausts from oneend and admits the strong steam to the other end of the small cylinderW. The piston E, impelled thereby, acts through the rod 6 and its slot6, and rocks the shaft R, effecting the required reversion of thepositions of the two pistonvalves 1?. This operation involves a littletime. In order to enable our pump to work rapidly, the parts should beset so that the movement will be initiated when the main piston lacks aninch or some other considerable space of the end of its stroke. Theconstruction insures that the action is certain. The main piston O, withits connected pumpplunger, continues to move until the shaft R isrocked,,and this shaft does not commence to rock until the valveVhasbeen thrown sufficiently to reverse the action of the steam on the smallpiston E.

The rod e is finished accurately with circumferential grooves (2*dividing its surface into a series of rings, each separated from theother byalit-tle space. Jis atube,which is truly finished in itsinterior and extends from the steam-chest B to the steam-chest W. Itsinterior matches tightly but easily to the surface of the rod 0. Thesteam which passes a few of the first rings is obstructed in the spaces,and as there is an equal pressure for a portion of the time in thereverse direction the spaces become filled with steam and water at atolerable pressure and there is no appreciable motion. The friction isslight.

Modifications may be made without departing from the principle orsacrificing the advantages ofthe invention.

We claim as our invention 1. The two piston-valves 1?, links Q, and armsR in combination with each other and with the main piston 0, rod 0, anda pump operated by the latter and with the arm 1%, rod e, piston E,cylinder V, and valve V, with provisions for operating the latter by themovement of the main piston, all substantially as herein specified.

2. In a steam-pump having balanced main valves I, actuated by aconnected piston, E, the controlling-valve V, actuated by the motion ofthe main piston through connections, as Z Y, and provided with adjustingmeans 4r, whereby the intermittent motion imparted from the main pistonmay be varied, substantially as herein specified.

3. The close-fitting tube J, inclosing the circumferentially-grooved rod6, in combination with the steam-chest B, cylinder V, and piston E, andmeans, as valve V, for distributing the steam to this cylinder,the saidrod 6 operating through means, as the shaft'lt and its arms R It andconnected piston-valves P, to distribute the steam to the main cylinderB, all substantially as herein specified.

In testimony whereof we have hereunto set our hands, at New York,this7th day of June, 1887, in the presence of two subscribing witnesses.

JAMES H. FOGARTY. FREDK. M. WHEELER. WVitnesses:

M. F. BOYLE, CHARLES R. SEARLE.

IIO

